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[HADOOP-11238] Update the NameNode's Group Cache in the background when possible - Hadoop - [issue]
...This patch addresses an issue where the namenode pauses during group resolution by only allowing a single group resolution query on expiry. There are two scenarios:1. When there is not yet a...
http://issues.apache.org/jira/browse/HADOOP-11238    Author: Chris Li, 2014-12-13, 15:25
[HADOOP-11299] Selective Group Cache Refresh - Hadoop - [issue]
...Currently groups can be refreshed via dfsadmin -refreshUserToGroupMappings, but this places an undue stress on LDAP if we clear everything at once, where we may only want to refresh a single...
http://issues.apache.org/jira/browse/HADOOP-11299    Author: Chris Li, 2014-11-12, 21:33
[HADOOP-10376] Refactor refresh*Protocols into a single generic refreshConfigProtocol - Hadoop - [issue]
...See https://issues.apache.org/jira/browse/HADOOP-10285There are starting to be too many refresh*Protocols We can refactor them to use a single protocol with a variable payload to choose what...
http://issues.apache.org/jira/browse/HADOOP-10376    Author: Chris Li, 2014-11-12, 21:32
[HADOOP-10302] Allow CallQueue impls to be swapped at runtime (part 1: internals) Depends on: subtask1 - Hadoop - [issue]
...We wish to swap the active call queue during runtime in order to do performance tuning without restarting the namenode.This patch adds only the internals necessary to swap. Part 2 will add a...
http://issues.apache.org/jira/browse/HADOOP-10302    Author: Chris Li, 2014-11-06, 23:46
[HADOOP-10284] Add metrics to the HistoryRpcScheduler - Hadoop - [issue]
http://issues.apache.org/jira/browse/HADOOP-10284    Author: Chris Li, 2014-11-06, 21:52
[HADOOP-10283] Make Scheduler and Multiplexer swappable - Hadoop - [issue]
...Currently the FairCallQueue uses the DecayRpcScheduler & RoundRobinMultiplexer, this task is to allow the user to configure the scheduler and mux in config settings...
http://issues.apache.org/jira/browse/HADOOP-10283    Author: Chris Li, 2014-11-06, 21:51
[HADOOP-10280] Make Schedulables return a configurable identity of user or group - Hadoop - [issue]
...In order to intelligently schedule incoming calls, we need to know what identity it falls under.We do this by defining the Schedulable interface, which has one method, getIdentity(IdentityTy...
http://issues.apache.org/jira/browse/HADOOP-10280    Author: Chris Li, 2014-09-04, 02:16
[HADOOP-10285] Admin interface to swap callqueue at runtime - Hadoop - [issue]
...We wish to swap the active call queue during runtime in order to do performance tuning without restarting the namenode.This patch adds the ability to refresh the call queue on the namenode, ...
http://issues.apache.org/jira/browse/HADOOP-10285    Author: Chris Li, 2014-09-04, 02:16
[HADOOP-10279] Create multiplexer, a requirement for the fair queue - Hadoop - [issue]
...The Multiplexer helps the FairCallQueue decide which of its internal sub-queues to read from during a poll() or take(). It controls the penalty of being in a lower queue. Without the mux, th...
http://issues.apache.org/jira/browse/HADOOP-10279    Author: Chris Li, 2014-09-03, 21:36
[HADOOP-10281] Create a scheduler, which assigns schedulables a priority level - Hadoop - [issue]
...The Scheduler decides which sub-queue to assign a given Call. It implements a single method getPriorityLevel(Schedulable call) which returns an integer corresponding to the subqueue the Fair...
http://issues.apache.org/jira/browse/HADOOP-10281    Author: Chris Li, 2014-09-03, 20:51
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB